Plastic Black Cap PET PE Aluminum Foil Bottle Cap Gasket Bottled Drinking Water Rotating Cap For Sale

Product Description :

Here is an overview of the making principles:

1. Material Selection

Cap Material:

Plastics: Commonly used materials include polypropylene (PP) or high-density polyethylene (HDPE) due to their durability, flexibility, and food-safe properties.

Gasket Material:

Elastomers: Materials such as silicone or thermoplastic elastomers (TPE) are used for the gasket to provide a flexible, airtight seal.

2. Design and Engineering

Cap Design:

Threaded Interior: The inside of the cap is designed with threads that match the bottle’s neck, allowing for easy screwing on and off.

Ergonomic Shape: The exterior design often includes ridges or textures to improve grip and make it easier to twist open.

Gasket Design:

Placement: The gasket is positioned inside the cap, typically on the inner rim, to create a seal when the cap is screwed on.

Shape and Size: The gasket must be precisely shaped and sized to ensure it compresses properly against the bottle’s neck to form a tight seal.

3. Manufacturing Process

Injection Molding for Caps:

Mold Creation: A mold is created based on the cap’s design specifications.

Plastic Injection: Molten plastic is injected into the mold to form the cap. After cooling, the cap is ejected from the mold.

Gasket Insertion:

Gasket Production: The gaskets are produced separately, usually through molding or die-cutting from sheets of elastomeric material.

Assembly: The gasket is inserted into the cap, either manually or via automated machinery, ensuring it fits securely in the designed recess.

4. Quality Control

Dimensional Accuracy:

Tolerance Checks: Both caps and gaskets are measured for dimensional accuracy to ensure a perfect fit and reliable sealing.

Material Testing: Materials are tested for durability, flexibility, and resistance to chemicals and temperatures.

Sealing Efficiency:

Leak Tests: Caps are tested for their sealing efficiency by screwing them onto bottles and checking for leaks under pressure or when inverted.

Twist Torque Testing: Ensuring the cap can be easily twisted open and closed while maintaining a secure seal.

5. Functionality and Usability

User-Friendly Features:

Easy Grip: Textured or ridged designs make it easier for users to twist the cap open and closed.

Secure Seal: The combination of the threaded cap and gasket ensures a leak-proof, airtight seal, essential for maintaining the purity and freshness of the bottled water.

Consistency:

Automated Assembly: Using automated machinery for consistent placement of gaskets ensures each cap meets quality standards.

Batch Testing: Periodic testing of caps from each production batch to ensure ongoing quality and performance.

FAQ:

Q:Can I have free samples?
A: Samples are free, we welcome you to place sample orders to test and check quality. Customized samples need to pay sample fees,
mixed samples are acceptable, Common samples only need to pay air freight.

Q: What is the lead time?
A: Samples can be prepared in 1-2 days, mass production needs 15-30days. It depends on QTY.

Q: How to control the quality?
A:Full inspection twice on assemble line by testing machines. Spot check every two hours.

Q:Can you guarantee your products have top quality?
A:We offer guarantee for our products we sell and after sell services.